Analysis for Densification Behavior and Grain Growth of Nanocrystalline Ceramic Powder under High Temperature

나노 세라믹 분말의 고온 치밀화와 결정립 성장의 해석

  • 김홍기 (포항공과대학교 기계공학과) ;
  • 김기태 (포항공과대학교 기계공학과)
  • Published : 2000.11.01


Densification, grain growth, and phase transformation of nanocrystalline ceramic powder were investigated under pressureless sintering, sinter forging, and hot pressing. A constitutive model for densification of nanocrystalline ceramic powder was proposed and implemented into a finite element program (ABAQUS). A grain growth model was also proposed by including the effect of applied stress on grain growth when phase transformation occurs. Finite element results by using the proposed models well predicted densification behavior, deformation, and grain growth of nanocrystalline titania powder during pressureless sintering, sinter forging, and hot pressing. Finite element results by using the proposed model also well predicted experimental data in the literature for densification behavior of nanocrystalline zirconia powder during pressureless sintering and sinter forging.


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